
	function select_all(){
		$('.stud_in_select option').attr('selected', 'selected');	
		document.forms[0].submit();
	}
	
	function move_options(from, to){
		$(from).click(function(){
			$(from + ' option:selected').appendTo(to);
			$(to + ' option:selected').removeAttr('selected');
		});
	}
	